阅读说明：本技术 一种用于电子级玻璃纤维纱的粘着剂及其制备方法 (Adhesive for electronic grade glass fiber yarns and preparation method thereof ) 是由 王登宝 李宝明 崔淑利 郑木松 鹿贵滨 王玉东 于 2020-06-05 设计创作，主要内容包括：一种用于电子级玻璃纤维纱的粘着剂及其制备方法,属于电子级玻璃纤维技术领域。包括以下重量份的原料：乙基纤维素1~2份、乙醇水溶液6~8份、羧甲基纤维素钠2~3份、邻苯二甲酸二丁酯0.5~1.0份。制备方法,包括如下步骤：1)将乙醇和乙基纤维素混合搅拌,获得乙基纤维素溶液；2)将乙醇和羧甲基纤维素钠混合搅拌,获得羧甲基纤维素钠溶液；3)将羧甲基纤维素钠溶液倒入乙基纤维素溶液中,搅拌2~3小时获得混合液；4)按重量份向混合液中加入邻苯二甲酸二丁酯,搅拌均匀即得粘着剂。本发明的用于电子级玻璃纤维纱的粘着剂,其粘接力强、耐高温,粘接后接头不易发硬、不易变色残留。(An adhesive for electronic grade glass fiber yarns and a preparation method thereof belong to the technical field of electronic grade glass fibers. The feed comprises the following raw materials in parts by weight: 1-2 parts of ethyl cellulose, 6-8 parts of ethanol aqueous solution, 2-3 parts of sodium carboxymethyl cellulose and 0.5-1.0 part of dibutyl phthalate. The preparation method comprises the following steps: 1) mixing and stirring ethanol and ethyl cellulose to obtain an ethyl cellulose solution; 2) mixing and stirring ethanol and sodium carboxymethyl cellulose to obtain sodium carboxymethyl cellulose solution; 3) pouring the sodium carboxymethyl cellulose solution into the ethyl cellulose solution, and stirring for 2-3 hours to obtain a mixed solution; 4) adding dibutyl phthalate into the mixed solution according to the weight parts, and uniformly stirring to obtain the adhesive. The adhesive for the electronic grade glass fiber yarns has strong adhesive force and high temperature resistance, and joints are not easy to harden and color change residue after adhesion.)

1. The adhesive for the electronic grade glass fiber yarns is characterized by comprising the following raw materials in parts by weight: 1-2 parts of ethyl cellulose, 6-8 parts of ethanol aqueous solution, 2-3 parts of sodium carboxymethyl cellulose and 0.5-1.0 part of dibutyl phthalate.

2. The adhesive for electronic grade glass fiber yarns according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 1.3-1.8 parts of ethyl cellulose, 6.3-7 parts of ethanol water solution, 2.3-2.8 parts of sodium carboxymethyl cellulose and 0.6-0.8 part of dibutyl phthalate.

3. The adhesive for electronic grade glass fiber yarns according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 1.5 parts of ethyl cellulose, 6.5 parts of ethanol water solution, 2.7 parts of sodium carboxymethyl cellulose and 0.7 part of dibutyl phthalate.

4. The adhesive for electronic grade glass fiber yarns according to claim 1, wherein: the ethanol water solution contains 30-60% of ethanol by volume.

5. The adhesive for electronic grade glass fiber yarns according to claim 4, wherein: the ethanol in the ethanol water solution accounts for 40 percent by volume.

6. The method for preparing the adhesive for the electronic-grade glass fiber yarns, as recited in any one of claims 1 to 6, comprises the following steps:

1) putting the ethanol water solution into a stirrer, starting the stirrer, pouring ethyl cellulose according to the weight part, and stirring for 1-2 hours to obtain an ethyl cellulose solution;

2) putting the ethanol water solution into a stirrer, starting the stirrer, pouring sodium carboxymethylcellulose into the stirrer according to the weight part, and stirring for 1-2 hours to obtain a sodium carboxymethylcellulose solution;

3) pouring the sodium carboxymethyl cellulose solution into the ethyl cellulose solution, and stirring for 2-3 hours to obtain a mixed solution;

4) adding dibutyl phthalate into the mixed solution according to the weight parts, and uniformly stirring to obtain the adhesive.

7. The method of claim 6, wherein the adhesive is prepared by the following steps: the stirring speed of the steps 1) and 2) is 80-120 rpm.

Technical Field

An adhesive for electronic grade glass fiber yarns and a preparation method thereof belong to the technical field of electronic grade glass fibers.

Background

Electronic grade glass fiber is an important basic source material in the industries of electronic information, aerospace and the like, almost appears in each electronic component and is spread in various fields of national economy and national defense and military industry. Electronic glass fiber cloth woven by electronic grade glass fibers is called electronic cloth for short, is an essential basic material for the industries of copper-clad plates and printed circuit boards, and the performance of the electronic glass fiber cloth determines important performances such as electrical performance, mechanical performance, dimensional stability and the like of the copper-clad plates and the printed circuit boards to a great extent.

The existing electronic grade glass fiber yarn is easy to have the phenomena of broken filaments and broken ends in the processes of cabling, sizing and weaving; the phenomena of broken filaments and broken ends can affect the insulating property of high-precision circuit boards such as large computers. In actual production, the binder is usually used to bind the broken glass fiber yarn. The main adhesive component of the existing adhesive is molding powder, acetone is added, the mixture is diluted by steam at high temperature, and then alcohol is added to be stirred to be transparent; and overlapping two ends of the broken yarn, bonding the yarn by using a bonding agent to form a joint, airing the bonding agent, and continuously weaving. The applicant finds through research that the prior adhesive has the following problems:

firstly, the existing binder has low bonding force, so that the problem of end warping at joints is easy to occur, the woven cloth surface is not flat, and the joints with the end warping are easy to fracture again (broken wires for short), and the parking treatment is needed. The repeated bonding of broken joints not only reduces the production efficiency, but also affects the appearance quality of the product. In the prior art, in order to improve the firmness of the joint, a mode of increasing the lap joint length of the joint is often adopted, the existing lap joint length of the joint is 10-12 cm, although the bonding force is improved, the joint becomes long and obvious, an obvious flaw is formed on the cloth surface, the quality of cloth is reduced, and the selling price is influenced.

Secondly, the flexibility of the existing adhesive is poor after drying, so that the joints are too hard and difficult to bend and stretch, yarns are difficult to pass through gaps of reeds for controlling the density of warp yarns in the weaving process, the too hard joints are difficult to bend, and the yarns are easy to break again. Finally, the existing adhesives do not resist high temperature and leave much residue after smoldering. When the electronic cloth is braised at a high temperature of more than 300 ℃, the residual quantity of the existing adhesive is high, and obvious yellowish stains are formed on the cloth surface after braising, so that the appearance and the selling price of the electronic cloth are influenced. Meanwhile, when the surface of the yarn bonded by the existing adhesive is treated at the steam temperature of 140 ℃, the joint still presents light yellow traces after passing through the coupling agent, and the trace is very obvious on the cloth surface of the electronic cloth, like the marked position of the joint. Affecting the appearance quality of the product.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the adhesive for the electronic-grade glass fiber yarns has strong bonding force and high temperature resistance, and joints are not easy to harden and color-changing residue after bonding.

The technical scheme adopted by the invention for solving the technical problems is as follows: the adhesive for the electronic grade glass fiber yarn comprises the following raw materials in parts by weight: 1-2 parts of ethyl cellulose, 6-8 parts of ethanol aqueous solution, 2-3 parts of sodium carboxymethyl cellulose and 0.5-1.0 part of dibutyl phthalate.

The adhesive for the electronic grade glass fiber yarn comprises the following raw materials in parts by weight: 1.3-1.8 parts of ethyl cellulose, 6.3-7 parts of ethanol water solution, 2.3-2.8 parts of sodium carboxymethyl cellulose and 0.6-0.8 part of dibutyl phthalate.

The adhesive for the electronic grade glass fiber yarn comprises the following raw materials in parts by weight: 1.5 parts of ethyl cellulose, 6.5 parts of ethanol water solution, 2.7 parts of sodium carboxymethyl cellulose and 0.7 part of dibutyl phthalate.

The ethanol water solution contains 30-60% of ethanol by volume.

The ethanol in the ethanol water solution accounts for 40 percent by volume.

The preparation method of the adhesive for the electronic grade glass fiber yarns comprises the following steps:

1) putting the ethanol water solution into a stirrer, starting the stirrer, pouring ethyl cellulose according to the weight part, and stirring for 1-2 hours to obtain an ethyl cellulose solution;

2) putting the ethanol water solution into a stirrer, starting the stirrer, pouring sodium carboxymethylcellulose into the stirrer according to the weight part, and stirring for 1-2 hours to obtain a sodium carboxymethylcellulose solution;

3) pouring the sodium carboxymethyl cellulose solution into the ethyl cellulose solution, and stirring for 2-3 hours to obtain a mixed solution;

4) adding dibutyl phthalate into the mixed solution according to the weight parts, and uniformly stirring to obtain the adhesive.

The stirring speed of the steps 1) and 2) is 80-120 rpm.

The invention is described below:

the steps 1) to 4) are all carried out at normal temperature, the normal temperature is 5 to 35 ℃, and the preferred normal temperature is 21 to 30 ℃.

In the preparation method, the ethanol in the formula in parts by weight is divided into two parts, wherein one part of the ethanol is mixed with the ethyl cellulose in the step 1), and the other part of the ethanol is mixed with the carboxymethyl cellulose in the step 2), so that the ethyl cellulose and the carboxymethyl cellulose are uniformly dispersed in the ethanol water solution respectively. Preferably, the weight ratio of the ethanol aqueous solution and the ethyl cellulose in the step 1) is 1-2: 1 and mixing.

Compared with the prior art, the adhesive for the electronic grade glass fiber yarns and the preparation method thereof have the beneficial effects that:

1. the adhesive for the electronic grade glass fiber yarns has strong adhesive force and high viscosity, the bonded yarns are not easy to warp and break during weaving, and the length of a joint is shortened. The formula of the invention can obtain higher adhesive force, so that the joint is not easy to break; the high-viscosity adhesive can be obtained by adopting the formula disclosed by the invention, and the problem of end warping after the broken ends of the yarns are bonded is avoided. With the improvement of viscosity and bonding force, the adhesive provided by the invention can obviously shorten the lap joint length of the joint, and the lap joint length is 1.5-2 cm, so that lower broken yarn rate and lower warping rate can be ensured, and the influence on the appearance of a cloth cover due to the joint is avoided.

2. The adhesive for the electronic grade glass fiber yarns is flexible in bonded joints and easy to bend, so that the yarns are convenient to weave, and the joints are prevented from being repeatedly broken in the weaving process.

3. The adhesive for electronic grade glass fiber yarns has good high temperature resistance effect and low residue after smoldering, and is not easy to turn yellow in the subsequent surface treatment at 140 ℃.

4. The adhesive for the electronic grade glass fiber yarns disclosed by the invention is relatively quick in volatilization, can be quickly dried, reduces the parking time and improves the production efficiency. When the problem of yarn breaking and yarn breaking occurs in the weaving process, the weaving machine needs to be stopped, an adhesive joint is used, and the weaving machine can be started again after the joint is dried. The existing adhesive can be fully dried in 30-40 seconds (s for short), and the production progress is seriously influenced. By using the adhesive joint, the adhesive can be dried completely within 7-10 seconds under the condition of the same temperature, so that the parking time is shortened, and the production efficiency is improved. The applicant adds the ethanol water solution in the formula of the invention, thereby accelerating the volatilization and drying speed of the adhesive; the ethanol accounts for 30-60% of the volume of the ethanol aqueous solution, if the ethanol content is too high, the connector which is volatilized too fast cannot be coated uniformly, and the end warping is easy to occur, and if the ethanol content is too low, the adhesive is dried slowly; 6-8 parts of 30-60% ethanol aqueous solution by volume percentage can control the volatilization time of the adhesive to be dried completely within 7-10 seconds, so that the time for waiting for the joint to be dried is saved, and the quality of the joint is not affected.

Detailed Description